Xerath

I blame the fact that Vkei choruses always change key, tempo or time-signature, and therefore you can't really judge an entire song by it's chorus.

Previews are not ever a medium for giving a final valutation of something, I used to judge things by a preview and I ended to be disappointed/surprised in each occasion, sometimes in an unpleasant way. So I prefer to always wait for the finished product, so there won't be any margin of error, as it's the thing as whole, not bits of it. That's my personal approach for all the things, from music to movies to TV and I never had problems in general with it...